The invention provides a repairing method of an array base plate of a liquid crystal display device, and the array base plate comprises a plurality of scanning lines, a plurality data lines in cross installation with the scanning lines, a plurality of public electrode lines installed parallel to the scanning lines, and a plurality of pixel electrodes positioned near the crossed areas of the data lines and scanning lines; wherein, for the public electrode lines having line breaking disadvantage, the repairing is held as following: leading pixel electrodes corresponding to the line breaking disadvantage to be separated into a plurality of electrically isolated areas, and one of the areas is electrically connected with the public electrode lines. According to the invention, leading the pixelelectrode to be separated into a plurality of areas electrically separated, wherein the public electrode lines on two sides of an opening of the public electrode line breaking position realize electric connection through one of the areas, and synchronously at least one of the other areas is non-bright area, thereby preventing the producing of entire pixel bright spot disadvantage when repairing the line breaking disadvantage of the public electrode lines.